1.  Which of the following statements about Nuclear fusion is INCORRECT?
(a) the mass of Helium nucleus produced is exactly the same as the mass of
four Hydrogen nuclei
(b) neutrinos are produced
(c) energy is produced
(d) high temperatures are required
(e) Sun is generating energy via Nuclear fusion

2. Neutrinos are
(a) a type of neutron
(b) a type of photon produced in the core of the Sun
(c) neutral atoms
(d) low mass particles produced in the core of the Sun
(e) more massive than Hydrogen nuclei

3. Io is the most volcanically active body in the Solar system because
(a) it is being constantly stretched by the tidal forces of Jupiter
(b) it is being constantly stretched by the tidal forces of the Sun
(c) of the constant bombardment by comets and asteroids
(d) of the intense Solar radiation
(e) of radioactive decay of Uranium in its interior